Gas Piston Conversion Assembly

ABSTRACT

A gas piston conversion assembly for converting a gas impingement system of an AR-15 rifle to a gas piston system includes an upper receiver that is installable into an AR-15 rifle. The upper receiver has a well extending rearwardly in the upper receiver. The well is aligned with a gas tube of the AR-15 rifle when the upper receiver is installed in the AR-15 rifle. A piston is insertable into the well. The piston is in fluid communication with the gas tube when the piston is inserted into the well and the upper receiver is integrated into the AR-15 rifle. The piston is urged rearwardly in the well by pressurized gasses when the AR-15 rifle is fired. Moreover, the piston strikes a bolt mechanism of the AR-15 rifle when the piston is urged rearwardly for cycling the bolt mechanism.

(b) CROSS-REFERENCE TO RELATED APPLICATIONS

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(c) STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

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(d) THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT

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(e) INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISC OR AS A TEXT FILE VIA THE OFFICE ELECTRONIC FILING SYSTEM

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(f) STATEMENT REGARDING PRIOR DISCLOSURES BY THE INVENTOR OR JOINT INVENTOR

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(g) BACKGROUND OF THE INVENTION (1) Field of the Invention (2) Description of Related Art Including Information Disclosed under 37 CFR 1.97 and 1.98

The disclosure and prior art relates to conversion devices and more particularly pertains to a new conversion device for converting a gas impingement system of an AR-15 rifle into a gas piston system.

(h) BRIEF SUMMARY OF THE INVENTION

An embodiment of the disclosure meets the needs presented above by generally comprising an upper receiver that is installable into an AR-15 rifle. The upper receiver has a well extending rearwardly in the upper receiver. The well is aligned with a gas tube of the AR-15 rifle when the upper receiver is installed in the AR-15 rifle. A piston is insertable into the well. The piston is in fluid communication with the gas tube when the piston is inserted into the well and the upper receiver is integrated into the AR-15 rifle. The piston is urged rearwardly in the well by pressurized gasses when the AR-15 rifle is fired. Moreover, the piston strikes a bolt mechanism of the AR-15 rifle when the piston is urged rearwardly for cycling the bolt mechanism.

There has thus been outlined, rather broadly, the more important features of the disclosure in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional features of the disclosure that will be described hereinafter and which will form the subject matter of the claims appended hereto.

The objects of the disclosure, along with the various features of novelty which characterize the disclosure, are pointed out with particularity in the claims annexed to and forming a part of this disclosure.

(i) BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWING(S)

The disclosure will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:

FIG. 1 is a right side phantom view of a gas piston conversion assembly according to an embodiment of the disclosure.

FIG. 2 is a right side cut-away view of an embodiment of the disclosure.

FIG. 3 is a right side cut-away view of an un-modified upper receiver an embodiment of the disclosure.

FIG. 4 is a right side cut-away view of an embodiment of the disclosure showing a piston and a well in a modified upper receiver.

(j) DETAILED DESCRIPTION OF THE INVENTION

With reference now to the drawings, and in particular to FIGS. 1 through 4 thereof, a new conversion device embodying the principles and concepts of an embodiment of the disclosure and generally designated by the reference numeral 10 will be described.

As best illustrated in FIGS. 1 through 4, the gas piston conversion assembly 10 generally comprises an upper receiver 12 that is installable into the AR-15 rifle 14. The upper receiver 12 has a forward end 16 and the forward end 16 has a well 20 extending rearwardly in the upper receiver 12. Additionally, the well 20 is aligned with a gas tube 28 of the AR-15 rifle 14 when the upper receiver 12 is installed in the AR-15 rifle 14.

A piston 32 is provided and the piston 32 is insertable into the well 20. The piston 32 is in fluid communication with the gas tube 28 when the piston 32 is inserted into the well 20 and the upper receiver 12 is integrated into the AR-15 rifle 14. The piston 32 is urged rearwardly in the well 20 by pressurized gasses when the AR-15 rifle 14 is fired. Moreover, the piston 32 strikes the bolt mechanism 34 of the AR-15 rifle 14 when the piston 32 is urged rearwardly for cycling the bolt mechanism 34. In this way the gas impingement system of the AR-15 rifle 14 is converted to a gas piston system.

The piston 32 has a front end 36 and a rear end 38, and the front end 36 has a diameter that is greater than a diameter of the rear end 38. In this way the piston 32 is inhibited from passing rearwardly out of the well 20 when the piston 32 is urged rearwardly in the well 20. The front end 36 receives gas pressure from the gas tube 28 when the AR-15 rifle 14 is fired thereby urging the piston 32 rearwardly in the well 20. The rear end 38 strikes the bolt mechanism 34 when the piston 32 is urged rearwardly in the well 20 for cycling the bolt mechanism 34. Additionally, the piston 32 is urged forwardly in the well 20 by the bolt mechanism 34 when the bolt mechanism 34 cycles. In this way the piston 32 is positioned to be subsequently urged rearwardly in the well 20 when the AR-15 rifle 14 is fired again.

In use, the piston 32 is inserted into the well 20 before the upper receiver 12 is installed in the AR-15 rifle 14. In this way the piston 32 is urged rearwardly in the well 20 by pressurized gases from the gas tube 28 when the AR-15 rifle 14 is fired. Thus, the piston 32 strikes the bolt mechanism 34 of the AR-15 rifle 14 for cycling the bolt mechanism 34. The bolt mechanism 34 urges the piston 32 forwardly in the well 20 when the bolt mechanism 34 is cycled. In this way the piston 32 is positioned to be urged rearwardly in the well 20 the next time the AR-15 rifle 14 is fired.

With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of an embodiment enabled by the disclosure, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by an embodiment of the disclosure.

Therefore, the foregoing is considered as illustrative only of the principles of the disclosure. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the disclosure to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the disclosure. In this patent document, the word “comprising” is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article “a” does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be only one of the elements. 

1. A gas piston conversion being configured to convert a gas impingement system of an AR-15 rifle into a gas piston system, said assembly comprising: an AR-15 rifle having a gas tube and a bolt mechanism, the gas tube having an integrally closed forward end; a bore extending perpendicularly between the gas tube and a barrel of the AR-15 rifle, the bore being rearwardly spaced from the integrally closed front end of the gas tube: an upper receiver being installable into the AR-15 rifle, said upper receiver having a forward end, said forward end having a well extending rearwardly in said upper receiver; and a piston being insertable into said well, said piston being in fluid communication with the gas tube when said piston is inserted into said well and said upper receiver is integrated into the AR-15 rifle, the gas tube having an integrally closed forward end, said piston being urged rearwardly in said well by pressurized gasses when the AR-15 rifle is fired, said piston striking a bolt mechanism of the AR-15 rifle when said piston is urged rearwardly for cycling the bolt mechanism.
 2. The assembly according to claim 1, Wherein said piston has a front end and a rear end, said front end having a diameter being greater than a diameter of said rear end, said front end receiving gas pressure from the gas tube when the AR-15 rifle is fired thereby urging said piston rearwardly in said well.
 3. The assembly according to claim 2, Wherein said rear end strikes the bolt mechanism when said piston is urged rearwardly in said well for cycling the bolt mechanism, said piston being urged forwardly in said well by the bolt mechanism when the bolt mechanism cycles.
 5. The assembly according to claim 1, wherein: said piston has a front end and a rear end, said front end having a diameter being greater than a diameter of said rear end, said front end receiving gas pressure from the gas tube when the AR-15 rifle is fired thereby urging said piston rearwardly in said well, said rear end striking the bolt mechanism when said piston is urged rearwardly in said well for cycling the bolt mechanism, said piston being urged forwardly in said well by the bolt mechanism when the bolt mechanism cycles.
 6. A gas piston conversion comprising: an AR-15 rifle having a gas tube and a bolt mechanism, the gas tube having an integrally closed forward end; a bore extending perpendicularly between the gas tube and a barrel of the AR-15 rifle, the bore being rearwardly spaced from the integrally closed front end of the gas tube; an upper receiver being installable into said AR-15 rifle, said upper receiver having a forward end, said forward end having a well extending rearwardly in said upper receiver; and a piston being insertable into said well, said piston being in fluid communication with said gas tube when said piston is inserted into said well and said upper receiver is integrated into said AR-15 rifle, said piston being urged rearwardly in said well by pressurized gasses when said AR-15 rifle is fired, said piston striking said bolt mechanism of said AR-15 rifle when said piston is urged rearwardly for cycling said bolt mechanism, said piston having a front end and a rear end, said front end having a diameter being greater than a diameter of said rear end, said front end receiving gas pressure from said gas tube when said AR-15 rifle is fired thereby urging said piston rearwardly in said well, said rear end striking said bolt mechanism when said piston is urged rearwardly in said well for cycling said bolt mechanism, said piston being urged forwardly in said well by said bolt mechanism when said bolt mechanism cycles. 